Marina site (5)
I believe the answer is:
inlet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">marina site</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for inlet that I've seen before include "A small creek or cove" , "Fiord" , "Bay or recess" , "Opening through which fluid can pass" , "Bay, cove" .)